Rotary Pump Conversion Unit for a Drywall Pump

ABSTRACT

A rotary pump conversion unit for a drywall pump is provided. The rotary pump conversion unit may allow a rotating drive shaft to convert momentum into vertical movement of a driven shaft. The driven shaft may be used to pump drywall mud into a drywall mud applicator. A major benefit of the present device is that the present rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. may be used in connection with a motorized drill as opposed to having to manually pump the device.

REFERENCE TO RELATED APPLICATIONS

This application claims priority to U.S. Provisional Application No. 63293935 titled ROTARY PUMP CONVERSION UNIT FOR DRYWALL PUMP which was filed on Dec. 27, 2021, the entire contents of which are incorporated by reference herein.

BACKGROUND OF THE INVENTION

A rotary pump conversion unit for a drywall pump is provided. The rotary pump conversion unit may allow a rotating drive shaft to convert momentum into vertical movement of a driven shaft. The driven shaft may be used to pump drywall mud into a drywall mud applicator. A major benefit of the present device is that the present rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. may be used in connection with a motorized drill as opposed to having to manually pump the device.

Fluid pumps are common. For Example, U.S. Pat. No.: 4,334,788 to Miner discloses a mixer-pump having a rotor shaft with a set of pins intermeshing in pins extending inwardly from a cylindrical stator to mix together materials flowing axially through the cylinder. The pins are generally cylindrical in shape except for a set of pins on the rotor shaft designated pumping pins which ae half cylindrical with their flat faces oriented to impart a longitudinal direction of travel of materials through the cylinder. Flow throughput is still further enhanced by a set of axially positioned vanes extending from the housing inwardly toward the rotor shaft with curved ends forming a scoop to receive materials being given a rotary flow component about the shaft by its rotation and convert the flow direction to an axial flow path.

However, this patent fails to describe a rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc which is easy to use. Further, this patent fails to provide for a rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. which allows for the pumping of drywall mud in a quick and efficient manner.

SUMMARY OF THE INVENTION

A rotary pump conversion unit for a drywall pump is provided. The rotary pump conversion unit may allow a rotating drive shaft to convert momentum into vertical movement of a driven shaft. The driven shaft may be used to pump drywall mud into a drywall mud applicator. A major benefit of the present device is that the present rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. may be used in connection with a motorized drill as opposed to having to manually pump the device.

An advantage of the present rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. is that the present device allows for easy pumping of drywall mud.

Still another advantage of the present rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. is that the present device may be used with a standard drill.

Another advantage of the present rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. is that the present device may be used in connection with a motorized drill as opposed to having to manually pump the device.

And another advantage of the present rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. is that the present device is durable.

For a more complete understanding of the above listed features and advantages of the rotary pump conversion unit reference should be made to the detailed description and the drawings. Further, additional features and advantages of the invention are described in, and will be apparent from, the detailed description of the preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a perspective side view of the drive shaft and driven shaft of the present rotary pump conversion unit.

FIG. 2 illustrates a side view of the drive shaft and driven shaft of the present rotary pump conversion unit wherein the bottom support unit is not yet secured to the driven shaft.

FIG. 3A illustrates a cross-sectional side view of the driven shaft connected to the drive shaft in a first position.

FIG. 3B illustrates a cross-sectional side view of the driven shaft connected to the drive shaft in a second position. FIG. 4 illustrates a cross-sectional side view of the driven shaft connected to the drive shaft.

FIG. 5 illustrates the entire rotary pump conversion unit for a drywall pump.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A rotary pump conversion unit for a drywall pump is provided. The rotary pump conversion unit may allow a rotating drive shaft to convert momentum into vertical movement of a driven shaft. The driven shaft may be used to pump drywall mud into a drywall mud applicator. A major benefit of the present device is that the present rotary pump conversion unit for a drywall pump, taper, flat finisher, corner unit, etc. may be used in connection with a motorized drill as opposed to having to manually pump the device.

Referring now to the figures, a rotary pump conversion unit 1 for use in connection with, for example, for a drywall pump 100, a taper, a flat finisher, a corner application or any other suitable device is provided. The rotary pump conversion unit 1 may have a drive shaft 10 and a driven shaft 50. The drive shaft 10 may be connected to a motor (not shown) via a first axle 11. The axle 11 may rotate along a central axis 12 similar to a drill bit rotating when connected to a drill.

In addition to the axle 11 and the drive shaft 10, the device 1 may have a top support unit 13 and a bottom support unit 14. In one embodiment, the top support unit 13 may be generally cylindrical and the bottom support unit 14 may be generally cylindrical.

In an embodiment, o-rings (not shown) may be used in connection with the pump conversion unit. In particular, o-rings may be inserted into grooves 80 of, for example, top support unit 13 and/or a bottom support unit 14 so as to enclose the chamber (the outer cylindrical object in FIG. 5 ) of the pump conversion unit and to reduce dust/debris from entering the chamber. A lubricant may also be added. The o-rings and lubricant may extend the life of the device 1 and may prevent overheating.

A distance 18 on the axle 11 may separate the top support unit 13 from the bottom support unit 14. An indented spiral groove 19 may be located on the axle 11 between the top support unit 13 and the bottom support unit 14. The indented spiral groove 19 may receive a portion of the driven shaft 50 (specifically a portion of the a screw) as described below.

The driven shaft 50 may have a top end 51, a bottom end 52 and a generally cylindrical side 53. An interior channel having an interior wall 54/65 may be located within the driven shaft 50 wherein the interior channel receives at least a portion of the axle 11.

The bottom end 52 of the driven shaft 50 may be inserted into a rod 20 of the pump which is then inserted into a bucket of drywall mud. When the driven shaft 50 is inserted into the bucket of drywall mud the rotary pump conversion unit 1 may be used to pump drywall mud from the bucket to, for example, a drywall pump 100, a taper, corner unit or flat finisher which, when full, may be used to properly finish drywall in a building.

Located near the top end 51 of the driven shaft 50 may be an opening 56 which creates a passageway completely through the top of the driven shaft 50. Inserted into the opening 56 may be a follower screw 60. The follower screw 60 may extend inward toward the interior of the driven shaft 50 so that the distal end 61 of the follower screw 60 extends past the interior wall 54/65 of the driven shaft 50. The distal end 61 of the follower screw 60 may be permanently locked/located within the indented spiral groove 19 of the axle 11 of the driven shaft 11. In one embodiment, the follower screw 60 is magnetic and attracted to the spiral groove 19 (which may also be magnetic) so as to better keep the end of the follower screw 60 within the spiral groove 19.

In an alternative embodiment, a second opening opposite the first opening 56 may also be present on the removable collar 70. The second opening (shown lacking a follower screw 60 in FIG. 3A and 3B) may be used in the event that the (first) opening 56 of the removable collar 70 wears out. In an embodiment, a removable collar 70 may be located within the bottom support unit 14. The removable collar 70 may have a first extended ridge 71 and a second extended ridge 72 which are received in identical shaped openings of the bottom support unit 14. The extended ridges 71/72 prevent the removable collar 70 from rotating independent to the bottom unit 14. The removable collar 70 may receive the follower screw 60 at the extended ridges 71/72. As a result of being able to remove the removable collar 70 from the bottom unit 14, the follower screw 60 is therefore replaceable. Further, by sliding the removable collar 70 into the bottom support unit 14, the removable collar 70 and the follower screw 60 remain protected during use. The first extended ridge 71 and the second extended ridge 72 may be positioned on directly opposite locations (180 degrees apart) on the removable collar 70 so as to provide increased durability.

As the drive shaft 10 rotates three hundred and sixty degrees along the central axis 12 as a result of being attached to a motor (not shown), the indented spiral groove 19 of the driven shaft 11 therein rotates three hundred and sixty degrees. As the indented spiral groove 19 of the driven shaft 11 rotates, the follower screw 60 is therein moved upward and downward as a result of the bottom unit 14 of the device not rotating with respect to the driven shaft 11. As a result, the movement of the drive shaft 10 three hundred and sixty degree is converted to the upward and downward vertical movement of the bottom unit 14. In particular, the upward and downward vertical movement of the bottom unit 14 acts in a reciprocating manner which therein pulls mud from an opening at the bottom of the device, via vacuum pressure, from a reservoir (or bucket) and deposits the mud into the drywall pump, taper, flat finisher, corner unit, etc.

Although embodiments of the invention are shown and described therein, it should be understood that various changes and modifications to the presently preferred embodiments will be apparent to those skilled in the art. Such changes and modifications may be made without departing from the spirit and scope of the invention and without diminishing its attendant advantages. 

I claim:
 1. A rotary conversion unit for a drywall pump comprising: a drive shaft connected to a driven shaft; a top support unit on the driven shaft; a bottom support unit on the driven shaft; wherein the top support unit is located above the bottom support unit on the driven shaft and wherein a distance separates the top support unit from the bottom support unit; a spiral groove on the driven shaft wherein the spiral groove is located between the top support unit and the bottom support unit; a follower screw secured within the bottom unit wherein an end of the follower screw is partially located within the spiral groove; wherein the rotation of the drive shaft rotates the driven shaft three hundred and sixty degrees and therein moves the follower screw up and down; and wherein the rotation of the drive shaft converts the rotational movement of the drive shaft into an up and down vertical movement of the bottom support unit.
 2. The rotary conversion unit for a drywall pump of claim 1 wherein the follower screw is magnetic.
 3. The rotary conversion unit for a drywall pump of claim 1 further comprising: a removable collar located within the bottom support unit; and wherein the follower screw completely passes through the removable collar.
 4. The rotary conversion unit for a drywall pump of claim 1 wherein the top support unit and the bottom support unit are cylindrical.
 5. The rotary conversion unit for a drywall pump of claim 3 further comprising: a first extended ridge on the removable collar; and a second extended ridge on the removable collar.
 6. The rotary conversion unit for a drywall pump of claim 5 wherein the follower screw passes through the first extended ridge or the second extended ridge of the removable collar.
 7. The rotary conversion unit for a drywall pump of claim 5 wherein the first extended ridge and the second extended ridge are on opposition locations on the removable collar. 